I went through all of the original trilogy extras disc yesterday, and there is definitely some nice little gems on there. In particular, I liked that Colin Cantwell's models were displayed and talked about, albeit far too little (it is seemingly impossible to find out information about Cantwell himself). I always liked Lorne Peterson, and his stories were among my favorites, as were the shots of the matte paintings, w. close-ups. The only problem is that it was too scattered and too light on proper information. Now this from the guy who's specialized in the evolution of idea to screen in Star Wars, so maybe I'm just too eager for more info.
Also, I still don't care what anyone says, there is no way the Falcon redesign was inspired by a burger.
I popped in ANH for a few scenes, and it looked alright, although the color timing was as to be expected.
As for the changes; how anyone could approve the new rockwall R2 is hiding behind boggles the mind. It looks just plain BAD. And Obi-Wans Krayt call... Well, you know.
Another highlight by the way, was the Holiday Special cartoon. It IS actually quite awesome...